Sanding machine



-Aug. 28, 1928.

' J. B. LEONARD smnme means 6 2 9 l 1 w u d e l i F I INVENTOR.

(lo/221B. Leonard ATTORNEY.

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J. -B. LEONARD SANDING MACHINE Filed May 17, 1926 3 Sheets-Sheet 2 l lluJ4,

INVENNR. Jo/urB. Leonard.

-J. B LEONARD Aug. 28, 1928.-

SANDING MACHINE Filed May 17., 1926 3 Sheets-Sheet 3 INVENTOR. (Zvfin.3. Leonard.

ll x nm ATTORNE Patented Aug. 28, 1928.

UNITED STATES JOHN B. LEONARD, OF DETROIT, MICHIGAN.

SANDING MACHINE.

Application filed Kay 17, 1928. Serial No. 109,476.

My invention relates to a. new and useful mprovement in a machine usedfor sandmg floors or other similar surfaces. With the san machines ascommonly used conslderable ust is produced in the. room in which thesanding is taking place because of the material which has been loosenedby the abrading member being thrown into the air.

The present invention has as its object the provision of a sandingmachine of this class in which the presence of dust in the room ma beeliminated.

other object of the present invention l5 1s the provision in combinationwith a sanding machine of this class of a vacuum or suction mechanismwhereby the loosened material may be quickly and easily drawn into acontainer by the suction mechanism. Another object of the invention isthe pro- Vision of a rotatable member having the abrasive materialmounted in such a manner that it may be easily and quickly removed andtightened on the drum of the rotatable member to any desired degree oftautness.

Another object of the present invention is the provision of a device ofthis class in a compact and durable form and to this end there isprovided a casing in which the fan and rotatable abrading member aremounted having the nozzle proJectin'g outwardly from the lower end ofthe casing.

Other objects will appear hereinafter.

The invention consists in the combination and arrangement of partshereinafter described and claimed.

The invention will be best understood from a description to theaccompanying drawings which form a part of this specification and inwhich,

Fig. 1 is a side elevational view of the invention.

Fig. 2 is a top plan view of the invention.

Fig. 3 is a fra entary sectional view taken on substantia y line 3--3 ofFig. 4.

Fig. 4 is a sectional view taken on. substantially line 44' of Fig. 3.

Fig. 5 is a perspective view of one of the casing sections used in theinvention.

Fig. 6 is a side elevational view of the drum used in the inventionshowing parts in section and parts broken away.

Fi 7 is a sectional view taken on substantially line 77 of Fig. 6.

Fig. 8 is a sectional view stantially line 8-8 of Fig. 7.

The casing used in the invention is made from a pair of sectionssimilarly constructed, one of these sections being quite clearly shownin Fig. 5 and the other section being similarly constructed with theevident reversal of parts, so that it is believed the structure of bothsections will be evident from a description of one section with suchother parts as may be pointed out.

The casing comprises a top wall 14, integral with which is the rear wall15, the side Wall 16, this side wall having the forwardly extendingportion 17. The rear wall 15 curves as is shown at 18 and forms the base19. The casing is provided with a chamber 20 communicating through theopening 21 and the passage 22 with the nozzle 23 which is formed withthe base 19 and the outwardly projecting tongue 24 which proj ects fromthe partition wall 25. The chamber 20 communicates through the conduit26 with the neck 27 in which is positioned the tubular conduit 28,communicating through the nipple 29 with a dust bag 30. Formed in thecasing is a chamber 31 which communicates with the nozzle 23 and bymeans of the conduit 32 with the neck 27. Journalled in the bearings 33and 34 mounted in plates 33 and 34 respectively which are suitablysecured to the side walls 16 and 16' of the housing is a shaft 35, uponwhich is fixedly mounted in the chamber 20 a rotatable fan 36 and in thechamber 31 a rotatable fan 37. In the forward extensions 17 and 17 ofthe side walls are mounted bearings 38 and 39 in which is suitablyjournalled a shaft 40, upon which is fixedly mounted by suitable setscrews 40 and 40 a drum 41. To properly seal the drum chamber are feltwashers 38 and 39 intermedially positioned between bearings 39 and 38and the hubs of the drum. .Covering .the periphery of the drum andsuitably "secured 100 thereto by screws or other fastening means is alayer of felt or other cushioning material 42. The drum is as shownlongitudinally split as at 43, this slot formed by splitting the drum 41extending spirally of the 105 drum. A head 44 is mounte in one end ofthe drum, this drum being formed cupshaped and the slot 43 being cutdownwardly into the base 45' of the drum. Mounted taken on subrotatablyin bosses 46 and 47 on the inner 1w surface of the drum are rollers 48and 49 in close proximity to each other. A layer of sand paper 50, emerycloth or other abrasive grinding or cutting material, is positionedabout the periphery of the drum, its ends 50' and 50" being projectedinwardly of the drum and engaged by the rollers 48 and 49. It is evidentthat upon a rotation of one of the rollers 48 or 49 a drawing inwardl ofthe ends of the abrasive covering 50 will be effected to draw it tautlyabout the periphery of the drum. Formed integral and extendinglongitudinally interiorly of the drum is a counterbalancing boss 41',

having an opening 41" adapted to receive a filling 41" which may be oflead or any other suitable metal to balance the drum on its axis.Mounted on the top 14 of the casing is a motor 51 connected bv a silentchain 52 to a ear wheel 53 fixedly mounted upon the shafl 40, so thatwhen the electric motor is operated it will serve to rotate the drum'41. This motor 51 also is utilized to drive the shaft 35 the connectionbeing made by means of the belting 54. Formed integral with each sectionof the casing is a knuckle 55 in which is journalled the axle 56 uponwhich the castors 57 are supported.

A knuckle 58 is formed in the top wall 14 of each section of thehousing, and projected through this knuckle 58 is a shaft 59 which alsois projected through cars 60 and 61 of the front shield 62 which extendsover and forwardly of the drum 41. Depending from this cover shield 62at the front thereof is a strip 63 and at one end the strip 64 and hingely connected to the bottom 19 rearwardly of the drum 41 is a strip 65,all of which are preferably made of felt. These strips depending fromthe forward end of the frame or housing serve to remove in advance ofthe machine foreign articles which may be present on the surface to besanded. It will be noted that the forwardly projecting portion 17 isprovided with ahead or outwardly projecting flange 66 (Fig. 5 and Fig.4), this fiangeor head 66 engaging the outer surface of the side walls67 and 68 of the cover shield.

The shafts 59 and 56 serve to bind the two sections of the casingtogether in the position shown in Fig. 4 as does likewise thebase of themotor 51 and the flange 70 of the base 27 of the neck 27.

In operation the operator may use the conduit 28 as a handle, a suitablehand hold 72 being mounted thereon. Mounted on the handle 28 is acontrol switch 71, used to control the electric current from its source,through the insulating cable 71' to the motor 31. The device may then bepropelled over the floor, the rotating drum with its covering ofabrasive material effecting the anding and polishing desired. Theformmllv projecting side walls 17 and 17 of the casing are suitablyreinforced by the ribs 73 so that in the sanding operation when thedevice is being used these walls afford the strength desired. At thesame time the fans are set into operation to effect a suction and thedust and other material removed from the floor or surface with which thedrum has been brought into contact anters the nozzle and passes throughthe central passage 22 into either the chamber 31 or the chamber 20.From the chamber 20 it is then directed through the conduit 26 into theneck 27 and from the chamber 31 it is projected into the neck 27 throughthe conduit 32. The castors supporting the device are positioned in themost advantageous location for effecting the purposes desired andpermitting the use of the machine for performing its functions. Whendesired the device may be rocked on its casters either forwardly orrearwardly so that the sanding device may be brought into very closeposition relatively to the side walls of a room. This feature of theinvention makes it most efiicient as the floor may besanded or 21- ishedalong its edges closer to the walls 1 n is now possible with knowndevices.

It is believed obvious that the structure is one which is compact,easily trans orted from place to place and easily operate The opera-tionis a sanitaryone for the operator 7 wish to limit myself to the preciseform of structure shown but desire to avail myself of such variationsand modifications as may come within the scope of the appended claims.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. A sanding machine of the class described, comprising: a housingformed from a pair of similar sections placed side to side, each of saidsections having a chamber formed therein and communicating with an inletpassage formed partly in each of said sections at the engaging faces,and communicating with an outlet passage formed partly by each of saidsections at the communiion eating faces; and a fan mounted in'each ofchambers; and means for binding said sections in engagement with eachother.

3. A sanding machine of the class described, comprising: a housingformed from a pair of similar sections placed side by side, each of saidsections having a chamber formed therein and communicating With an inletpassage formed partly in each of said sections at the engaging faces,and communicating with an outlet passage formed partly by each of saidsections at the communicating faces; a fan mounted in each of saidchambers; means for binding said sections in engagement with each other;a motor for driving said fans; and a base on said motor secured to theupper face of each of said sectlons and servlng as addltlonal means forretaining said sections in close relation to each other.

4. A sanding machine of the class described, comprising: a sectionalhousing; a plurality of fans mounted in said housing; a nozzle in saidhousing, said housing having a passage leading from said nozzle andprovided with branches leading to each of said fans and communicating atthe rear of said housing with an outlet passage.

In testimony whereof I have signed the JOHN B. LEONARD.

foregoing.

